Adsense After Every 2 Posts

Hi Guys. I am having trouble with some code.
I;m trying to have adsense have an ad after ever 2 posts. But so far it isnt working, I don;t know why.

Heres the code from my page. An if you want to see the site Im trying to fix, its on my profile.

[Code moderated. Per forum rules, please use the pastebin for large code excerpts.]